谁帮我解决3道数学题?（递等式,简便）重赏哦①（8.4*0.25+1.92）/（1.05/15+8.4/14）②[110-（5.6+1.1/0.25）]*0.01/0.125③18.9*178.178+0.49-17.8*189.189

Question

谁帮我解决3道数学题?（递等式,简便）重赏哦
①（8.4*0.25+1.92）/（1.05/15+8.4/14）
②[110-（5.6+1.1/0.25）]*0.01/0.125
③18.9*178.178+0.49-17.8*189.189

Answer 1

①（8.4*0.25+1.92）/（1.05/15+8.4/14）
=（2.1+1.92）/（0.07+0.6）
=4.02/0.67
=6
②[110-（5.6+1.1/0.25）]*0.01/0.125
=[110-(5.6+4.4)]*0.01*8
=[110-10]*0.01*8
=100*0.01*8
=8
③18.9*178.178+0.49-17.8*189.189
=18.9*17.8*10.01-17.8*18.9*10.01+0.49
=0.49